Grinder.



B. L. FRY.

GRINDER. I APPLICATION FILED MAY 24, 1913.

gme/wtoa STATES. PATENT OFFICE.

BENJAMIN L. FRY, 013 LOS ANGELES, CALIFORNIA, ASSIGNOR TO B. L. FRY IIANUIAC- TUBING COMPANY, OF ST. LOUIS, MISSOURI, A CORPORATION OF MISSOURI.

GRINDER.

I Specification of Letters Patent.

' Application filed Kay 24, 1s1s. Serial no. 769,628.

' To all whom it may concern Be it known that I, BENJAMIN L. FRY, a citizen of the United States, residing at Los Angeles, in the county of Los Angeles and State of California, have invented new and useful Im rovements in Grinders, of which the following is a specification. i

This invention has for its-object the provision of a machine for domestic use for lo sharpening knives, scissors and kindred edged implements or tools, the purpose being to provide a manually operable grinder involving a minimum number of parts-and a simple construction.

The primary intent-ion of the invention is the construction of a grinder embodying a vertical shaft, a grinding wheel secured to such shaft and arranged to rotate in a horizontal plane and support drive gearing embodying a pinion secured to the vertical shaft, and a drive gear of comparativelylarge diameter where y the grinding wheel is caused to rotate at. a comparative y high speed, which in practice gives the best results.

The invention consists of the novel features, details of construction and combination of parts, which hereinafter will be more particularly set forth, illustrated in the accompanyin drawing, and pointed out in the a pen ed claimsl p Re erring to the drawing, forming a part of the specification, Figure 1 is a. side view of a grinder embodying the invention; Fig. 2 is a front View partly in section; Fig. 3 is a detail .view of the guard or rest for the work.

Corresponding and like parts are referred to in the following description, and indicated in all the views of the drawing, by the same reference characters. The frame of the machine comprises a clamp 1 and bracket 2, the latter extending upwardly from the upper jaw of the clamp 1 and having the outer end of its overhanging arm formed with a vertical opening to receive the shaft 3, which carries the grinding Wheel 4. A collar or boss 5 is provided upon the upper side of the overhangin arm of the bracket 2 and receives the work rest or guard which is mounted to turn thereon. The shaft 3 is stepped at its lower end in the upper jaw of the clamp 1 and its up r porwheel.

stop collar 6 is pinned or otherwise secured to the shaft 3 and engages the under side of the overhanging arm of the bracket 2 and prevents vertical movement of the shaft. A

pinion 7 is secured to the lower end of the shaft 3 near the clamp and meshes with'a drive gear 8,. which :is mounted upon an axle 9 let into the upright member of the clamp 1, said drive gear being provided with a handle for manual operation, I 88' The guard or rest for the work comprises a horizontal bar 10 and uprights 11, the latter being equally spaced from the edge of the grinding .wheel 4 and located at diametrically opposite points. The upper ends of the uprights -11 project above the grinding wheel and are beveled, as indicated at 12, to give proper inclination to scissors or shears when sharpening the same. The bar 10 is provided at a. central point with an eye 13, 7 which is of a diameter to snugly receive the collar or boss 5 upon which the guard or rest is mounted to turn. A set screw 14 is threaded into an opening formed in a side of the eye 13 and its inner end is adapted to 30 engage the collar or boss 5 to holdthe guard or rest'in the required adjusted position. In the use-of the machine the knife blade to be sharpened is introduced into the space formed between the edge of the grinding 35 wheel and an upright 11 with its back resting upon the horizontal bar 10. The blade, is tilted to throw the edge against the ed of the wheel and with the back of the bla against the upright 11. In this position the blade is moved longitudinally upon the bar 10 to bring every portion of its ed e in contact with the grinding wheel. After the blade is ground upon one side it is reversed.

to the opposite side of the grinding wheel and the operation is repeated, thereby grindin both sides of the blade, with the result t at a keen edge is produced. The grinding or sharpening of the blade ma be finished upon the upper side of the grin ing When it is required to sharpen a pair of scissors or shears the blade is placed with its edge upon the top of the grinding wheel and with the blade against the beveled portion 12 of an upright 11. By having the guard or rest for the work mounted in the manner hereinbefore' stated it may be adjusted to the most convenient position and when so adjusted is madesecure by means of the set screw 14. 7 11 -that such changes may be made when desired as are within the scope of the claims appended hereto.

Having thus described the invention what is claimed as new, is

l. A grinding wheel comprising a frame having a projecting collar or boss, a shaft mounted in the frame, a grinding wheel secured to the projecting end of the shaft, means for imparting rotary movement to the grinding wheel, a bar having an eye intermediate of its ends to snugly receive the before mentioned collar or boss, and uprights at the ends of the bar extending along opposite edges of the grinding Wheel and spaced therefrom.

2. A grinder comprising a frame embody- 'ing a clamp and bracket, the latter having end of the shaft, a pinion made fast to the lower portion of the shaft, a drive gear mounted upon the clamp and having its teeth in mesh with the pinion, a work rest comprising a horizontal bar having an eye at a central point mounted upon the collar or boss of the bracket, and uprights at the ends of the bar extending along the edges of the grinding wheel and having their upper ends projecting above the plane of the grinding wheel and beveled, and a set screw threaded into the eye of the horizontal bar to secure the work rest in the adjusted position. I

In testimony whereof I aflix my signature in presence of two witnesses.

BENJAMIN L. FRY.

Witnesses 

